Fire-brick construction



April 8, 1930. H. HEITMAN FIRE BRICK CONSTRUCTION Filed June 26. 1928 E m M M Patented Apr. 8, 1930 UNITED STATES PATENT OFFICE HERBERT HEITMAN, OF WOOIDHAVEN, NEW YORK, ASSIGNOR TO THE FREDK PAGE CONTRACTING COMPANY, INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK FIRE-BRICK CONSTRUCTION Application filed June 26,

The principal object of the present inven tion is to compensate for the expansion which takes place in the refractory lining of boilers furnaces, incinerators and the like in such a way as to avoid substantial increase in the overall dimensions, Another object of the invention is to satisfactorily relieve the pressure due to expansion and in that way to avoid cracks and bulges in the linings themselves.

According to the present invention some of the bricks, without permitting leakage of gas, slide by each other as the material of the wall expands, thus taking care of all movement in the bricks themselves and thereby eliminating bulging or cracking.

Generally stated, the invention may be said to comprise a refractory lining including courses of rectangular fire brick having interposed therein L-shaped fire bricks arranged oppositely and in pairs with the faces of their intermediate port-ions in slidable contact and with the faces of the adjacent portions in spaced relation to provide gas tight expansion joints in the intermediate portions of the length of the lining.

The invention also comprises the improvements to be presently described and finally claimed.

In the following description reference will be made to the accompanying drawing show ing a lining embodying features of the invention.

In the drawing Figure 1 is an elevational view partly in section.

Fig. 2 is a partial sectional plan, and

Fig. 3 is a perspective view.

Referring to the drawing, the lining comprises courses of rectangular fire bricks I having interposed in the courses L-shaped fire bricks 2. The L-shaped fire bricks 2 are arranged oppositely and in pairs with the faces 3 of their intermediate portions in slidable contact and with the faces of the adjacent portions 4 in spaced relation. Between the faces 3 there is a thin bond but nevertheless under heat changes the faces 3 can slide and in sliding expansion is taken up throughout the wall or lining and not at its ends. The

1923. Serial No. 288,310.

spaces 5 accommodate expansion and contraction as the faces 3 slide while maintaining a gas-tight joint. L-shaped, by definition and as shown in the drawings, means that the two arms of the brick are of equal width and it appears from the drawings that in the wall the faces of the L-shaped bricks are flush with the surface of the wall.

I claim:

1. An L-shaped fire brick having arms of substantially equal width and adapted in pairs and in opposite disposition with the faces of the intermediate portions in contact and with the faces of the adj acent portions in spaced relation to provide longitudinal gas tight expansion joints in and flush with both faces of refractory linings intermediate of the ends thereof.

2. A refractory lining comprising a course of rectangular fire brick having interposed in and flush with the faces of the course L- shaped fire bricks having arms of substantially equal width and arranged oppositely and in pairs with the faces of their intermediate portions in slidable contact and with the faces of the adjacent portions in spaced relation to provide longitudinal gas tight expansion joints in the intermediate portions of the length of the lining, there being a thin bond between said faces which are in slidable contact.

HERBERT HEITMAN. 

